Engine cylinder block



May 21', 1935. F. G. SHOEMAKER ET AL 2,001,854

` v ENGINE CYLINDER BLOCK Filed April 5, 1935 4 Sheets-Sheet 1gru/vented ENGINE CYLINDER BLOCK Filed Aprils, '1953 4 sheets-'sheet 2juzga? 6717/ May ,21, 1935. F. G. SHOEMAKER ETAL ENGINE CYLINDER BLOCKFiled April 5,l 1935 4 SheetsfS'neet 3 May 21, 1935. F. G. sHoEMAKER ErAL. 2,001,854

ENGINE CYLINDER BLOCK Filed April 5, 1935 4 Sheets-Sheet 4 Patented May21, 1935 UNITED ySTATES PATENT oFEicE ENGINE CYLINDER BLOCK ApplicationApril s, 1933, serial No. 4,505

1o claims. (C1. 12s-11s) This invention relates to built up enginecylinder blocks consisting oi' parts which can be simply and cheaplyproduced and assembled and supported upon each other preferably by pressnts so as to be self holding in one complete assembly adapted to besoldered, welded, or brazed into a single whole.

More particularly, 4it relates to such cylinder blocks for engineshaving ports in their cylinder walls for the ilow of uid into or outfrom the cylinder, and still moref particularly to a U-type two-cycleinternal combustion engine.

Each cylinder is as far as possible a complete unit in itself adaptedfor combining into a single or multi-cylinder block of any desirednumber of cylinders with the use of only a few additional parts such assuitable top and bottom plates or deck anges connectingl any requirednumber of cylinders together.

One object of the invention is the construction of engine cylinderblocks of the foregoing type having known advantages of lightnessv inweight resistance of the walls between the port conduits.

to the flow of iluid through the port conduits by the provision ofstreamline fairing pieces therefor.

Another object of the invention is suitable provision for cooling thestreamline fairing pieces which are exposed to the hot exhaust gases andwhich'form part of a port chamber which is itsel! water cooled andencloses the port conduits.

A further object of the invention is-to provide water inlet means forthe water jacket o! each cylinder at diametrically opposite sidesthereof throughthe lower hold down flange of the cylinder block. 4

A still further object oi.' the invention is to construct a ribbed'upperor. top deck ilange for a cylinder block which, while thin and capableot being efficiently cooled, is adequately strong.

The above and other objects of the invention are hereinafter describedin 'conjunction with the accompanying drawings which show theapplication of the invention to the two complementary cylinders having acommon combustion chamber oi a U-type two-cycle internal'combustionengine injwhich the cylinders are united by a suitable upper deck angetowhich the cylinder head is attached and a lower hold down flange. areprovided with separate water jackets for each cylinder barrel, areprovided with 'water cooled ports with streamline iairing pieces to leadthe gases through the ports and have port chambers enclosing the iairingpieces through which the gases are led into or out from the ports.

' In the drawings: t

Figure l is a sectional elevation of the two complementary .cylinderscomplete with cylinder head.

Figure 2 is a section on line 2-2 oi' Figure 1. y

Figure 3 is a perspective view oi the underside oi the upper or top deckange.

Figure 4 is a perspective view of the upper end of a cylinder barrel.

Figure 5 is an exploded perspective view of the intake port chamber. l

Figure 6 is a perspective view ot the intake port iairing pieces.

Figure 'I is a perspective view oi' the exhaust port chamber withtubular fairings for the cylinder port conduits.

Figure 8 is an. elevation of the exhaust port chamber water Jacket.

Figure 9 is a part sectional, part end elevation of the cylinder blockshowing the lower end of a cylinder barrel complete with the lower holddown flange, the water jacket, and water inlet connections therefor.

VThe two cylinder barrels I and 2 which may be termed inlet'and exhaustcylinders respectively are machined from steel tubing.

' 'Ihe outer circumference of the inlet cylinder barrel I vis turnedwith a shoulder 3, a thin ilange 5, a thicker section T and a shoulder9. 'I'he exhaust cylinder barrel is turned correspondingly with ashoulder t, a thin tlange I, a thicker section l and a shoulder il. Allother unnecessary material on the outer circumference of the cylinderbarrels is machined away leaving strengthenmg ribs Il. Y

The thicker sections 'i and I forming integral sleeve portionsconstitutethe necessary stock in which to form the port conduits I 3 and Il forthe cylinder barrels i and 2 respectively. These thicker sections 1 andl partition the annular space between each cylinder barrel and itssurrounding water jacket. Between the port conduits il ot the inletcylinder barrel i grooves Il are milled in the thicker section sleeveportion The exhaust port conduits Hl are milled di rectionally as shownin Figure 2 togive easy egress of the exhaust gases in the outletdirection.

'Ihe thin anges 5 and t are notched out as shown in Figure 4 toprovidepassageways for the flow of water as will be later described.

The forged hold down iiange l'i common to the two vcylinders andprovided with bolt holes such as it is slipped over the lower ends ofthe two cylinder barrels and pressed up against the shoulders 9 and lilonthe cylinder barrels i and 2 respectively. -Circumferential shouldersi9 and 2U are provided on the hold down flange ii.

The water jackets 2@ and 2i for the cylinder barrels i and 2 are madefrom steel tubing machined inside and out. These Water jackets which areprovided with port openings 22 and 23 coincidental with the openings ofthe port conduits i3 and ii on the outer circumference of the cylinderbarrels are press tted over the sleeve portions 1 and 8 and the flanges5 and d.

The inlet port chamber 3d is lformed of two lap jointed halves 25 and2li consisting of sheet steel stampings as shown in Figure 5. This portchamber is press fitted. over the inlet cylinder water jacket 29.

Inserted in the port chamber are two segments 2 and 28 of a. ringl'iaving ports 29 to coincide with the cylinder port conduits and havinga conformation. such as' to provide fairings for those parts of thecylinder Wall or the water jacket surrounding and between the portconduits enclosed by the 'port Vchamber for the smooth streamlinedirectional flow of the charge through the port chamber -into the portconduits. These port fairing pieces are conveniently formed of castaluminum and are held in their proper position in the inlet port chamberby any suitable means. They may be pinned through the port chamber..

The exhaust port chamber 30 is similarly formed of two lap jointedhalves3i and 32 with punched holes 33 in each half connected by tubularfairing pieces 34. Thesefairing pieces are subjected to the ,heat of thehot exhaust gases, hence the need for water .cooling of the fairingpieces. The tubular fairing pieces 34 are press tted over the verticalsides of the punched holes 33 which form a plug and socket joint withthe tubular fairing. pieces.

A water jacket 34 for the exhaust port chamber 30 is similarly formed oftwo lap jointed halves enclosing the exhaust port chamber. Both theexhaust port chamber and the water jacket are press fitted over theexhaust cylinder water jacket 2|.

Holes 40 in the cylinder water jacket 2| above and below the exhaustport chamber 30 serve as inlet and outlet portsfor the-ow of water be'tween the water space around the cylinder barrel and the water spacearound the port chamber.

- 'I'he inletport chamber!! is slipped over the inlet cylinder-waterjacket 20. and located in its proper position againsta shoulder 35thereon. The exhaust .port chamber 3,0 along with its water jacket 34'is slipped over the exhaust cylinder water jacket 2l and located in itsproper position against a shoulder 36 thereon.

The water jackets complete with their port chambers are next slippeddown over the flanges 5 and 6, the sleeve portions l and 8, and onto theshoulders i@ and 20 on the hold down flange il.

A water jacket extension piece 31 is next slipped over the upper end ofthe water jackets 20 and 2i and against shoulders 38 and 39 thereon.This water jacket extension piece forms the top closure of the waterjacket between the cylinder water jackets and the upper deck ange IH,the water flowing through ports formed by notches in the thin anges 5and 6 as shown most clearly in Figure 4.

The upper deck flange is press fitted in the water jacket extensionpiece 3l and over the cylinder barrels i and 2, and is pressed intoposition against the shoulders .3 and i of the cylinder barrels.

Flanges l2 and i3 are press tted over the open ends of the inlet portchamber 2li and the exhaust port chamber 30 with its water jacket 34'.

The hold down flange l'i is provided with stepped down portions @Ilalong the sides of the cylinder block` at diametrically .opposite pointsof each cylinder barrel. Holes l5 are provided in this stepped downportion of the hold down flange. Water inlet port openings i6 areprovided in the cylinder water jacket above the holes Q5.

Tubular water inlet conduits di carry the cooling water through theholes i5 in flange Il and through the port openings iii into the waterjackets. The inlet conduits Lil are press fitted in the holes 35.

' By arranging the water inlet conduits through the hold down flange inthe foregoing manner,

the joint between the cylinder block hold down flange and the crank case(not shown) may serve also as the joint between the water inlet conduitsand a common rail water supply line (not shown) which may be formed inthe crank case.

As shown in Figure 3 the underside of the upper deck flange di, a steelforging, is provided with pockets i8 between the tapped stud holes isinto which the studs for the removable cylinder head are screwed. TheVbridge portion between the two cylinder barrels is provided withstrengthening ribs 50 and 5I. All the spaces and pockets on theunderside of the flange function as water cooling spaces while at thesame time they lighten the weight of the flange. Holes 52 in the bridgeportion and in each pocket 48 serve for the ow of water from the waterjackets of the cylinder barrels into the water jacket of the cylinderhead- 53 which is provided with coincidental holes and has a wateroutlet 5d.

We claim:

1. In a built up internal combustion engine cylinder block a cylinderbarrel, a top deck ange forming part of a combustion chamber, a Waterjacket for the cylinder barrel, a closure for the water jacket at thecombustion chamber end of the cylinder barrel consisting of a flange onthe cylinder barrel', and ports in the ange for the ow of water from thewater jacket of the cylinder barrel into a Water jacket extension piececonnecting the water jacket of the cylinder barrel to the top deckflange and constituting a cooling jacket for that part of the top deckange forming part of the combustion chamber.

formingva water jacket therefor, ports through the second named ilangefor the owl of water from the water jacket o! the cylinder barrel to thewater jacket of the top deck ilange, and port conduits through the wallsof the cylinder for the flow of iluid into or out of the cylinder.-

3. In a built up engine cylinder block in combination, a cylinderbarrel, a top deck ange for the cylinder head end and a hold down ilangefor the other end of the cylinder barrel, a water jacket for thecylinder barrel, a ange on the cylinder barrel forming a closure i'orthe water jacket at the cylinder head end, a water jacket extensionpiece connecting the water jacket of the cylinder barrel to the, topdeck ilange and forming Ya. water jacket therefor, ports through thesecond named iiange for the ilow ot water from the water jacket ot'thecylinder barrel to l the water jacket of the top deck flange; portconduits through the walls of the cylinder for the flow of fluid into orout ofthe cylinder, and a port chamber enclosing the port conduits andadapted to secure the streamline directional ilow of iiuid into or outof the port conduits.

4. In a built up engine cylinder block in combination, a. cylinderbarrel, a top deck iiange for the cylinder head end and a hold downflange for the other end of the cylinderbarrel. a water jacket for thecylinder barrel, a flange on the cylinder barrel forming a closure forthe water jacket at the cylinder head end, a water jacket extensionpiece connecting the water jacket of the cylinder barrel to the top deckilange and formingl a water jacket therefor, ports through the thirdnamed ange i'or the flow 'of water from the water jacket 'of thecylinder barrel to the water jacket of the top deck flange, portconduits through the4 walls oi.' the cylinder for the ilow o! iluid intoor out of the cylinder, a port chamber enclosing the port conduits andadapted to secure the streamline 'directional ilow of iluid into or outof the port conduits, and a water inlet conduit ,for the water jacket otthe cylinder barrel throughthe hold down ilange.

5. In a built up engine cylinder block in combination, a cylinderbarrel, a water jacket for the cylinder, forming cooling spacetherearound. a section of the cylinder barrel forming, together with asection of the water jacket, a partition for the cooling space, portconduits through ,-the partition, for the now of iluid into or out ofthe cylinder. channels in the partition -between the port conduits andclosed by the water jacket, forming cooling spaces for'the cylinderbarrel and the walls ot the port'conduits and providing for the ilow ofthe'cooling medium therethrough from the cooling space canone side otthe partition to the cooling space -on the other side of the partition.and means providing i'or the directional Ilow of fluid with a minimumresistance to the ilow thereof into or out oi the port conduitsconsistingoi a port chamber enclosing the port conduits and includingfairings for those parts of the cylinder wall and the-water jacketsurrounding and between the port conduits enclosed by the port chamber.

6. A built up engine cylinder block according to claim 5` in whichiairings for those parts of the cylinder walls surrounding and betweenthe port conduits enclosed by the port chamber are formed in a iairingpiece inserted and suitably held in the port chamber.

7. A built up engine cylinder block according to claim 5 in which theport chamber is provided with a water jacket which takes in water fromthe cylinder water jacketl through holes therein above and below theport chamber and in which the fairings include separate pieces oftubular section which are cooled by themselves' forming conduits fortheflow of water through the port chamber from the lower to the upper sideoi/ the 'water jacket of the port chamber.

8. Ina built up engine cylinder block in combination a cylinder, a waterjacket for the cylin` Y der, a hold down nange on the cylinder block anda water inlet conduit for the water jacket through the hold down ilange.

9. In a built up internal combustion engine cylinder block,complementary cylinder barrels,

having a common combustion chamber, a top deck iiange uniting thecylinder barrels and i'orming part of the combustion chamber, separatewater jackets for each cylinder barrel, a lower closure for the waterjackets consisting of a lower h old' down ilange common to the cylinderbarrels and an upper closure for each water jacket consisting of aflange on each cylinder barrel provided with ports for the now of waterfrom the water jacket of each cylinder barrel into a water jacketextension piece common to the cylinder barrels connecting the waterjackets of the cylinderbarrels to the top deck flange and constituting acooling jacket for that part of the top deck ange forming part of thecombustion chamber.

l0. In a built up internal combustion engine pockets for the flow ofw/ater therethrough into the water jacket of the cylinder head.

G. snoEMAKER. l Gomma n. mamme.

